How Can I Make Gridview Row Selectbale One At A Time And Button To Fetch The Record

See more:

ASP.NET

DevExpress

I want to make gridviews one row selctable at a time and there should be one button at the bottom of popup which will take that sected records

<dx:ASPxPopupControl ID="pcPendingApprovals" runat="server" RenderMode="Lightweight" ClientInstanceName="pcPendingApprovals"
    CloseAction="CloseButton" Modal="true" ShowCloseButton="true" Width="700px"
    PopupHorizontalAlign="WindowCenter" PopupVerticalAlign="WindowCenter"
    HeaderText="Plans Awaiting Approval" PopupAnimationType="Fade" EnableViewState="False">
    <ContentCollection>
        <dx:PopupControlContentControl ID="PopupControlContentControl3" runat="server">
            <dx:ASPxGridView ID="gvPendingApprovalList" ClientInstanceName="gvPendingApprovalList" Width="100%"
                KeyFieldName="Month" runat="server" AutoGenerateColumns="false" DataSourceID="odsPendingApprovalList"
                OnCustomCallback="gvPendingApprovalList_CustomCallback">
                <Columns>
                    <dx:GridViewDataTextColumn FieldName="EmployeeName" Caption="Employee Name" Width="10%" VisibleIndex="1"></dx:GridViewDataTextColumn>
                    <dx:GridViewDataDateColumn FieldName="Month" Caption="Month" SortOrder="Descending" Width="10%" VisibleIndex="2"></dx:GridViewDataDateColumn>
                    <dx:GridViewDataTextColumn FieldName="Year" Caption="Year" Width="20%" VisibleIndex="3"></dx:GridViewDataTextColumn>
                    <dx:GridViewDataTextColumn FieldName="ApproveStatus" Caption="Submitted" VisibleIndex="3"></dx:GridViewDataTextColumn>
                </Columns>
                <SettingsPager PageSize="5">
                </SettingsPager>
                <Settings ShowStatusBar="Hidden" ShowFilterRow="false" ShowGroupPanel="false" />
                <SettingsDataSecurity AllowDelete="False" AllowEdit="False" AllowInsert="False" />
            </dx:ASPxGridView>
            <asp:ObjectDataSource ID="odsPendingApprovalList" runat="server" TypeName="Assistpro.AssistproCRM.Presenter.PlanPresenter"
                SelectMethod="GetDirectReporteesSubmittedPlansByUserId" OnObjectCreating="odsPendingApprovalList_ObjectCreating"></asp:ObjectDataSource>
        </dx:PopupControlContentControl>


    </ContentCollection>


</dx:ASPxPopupControl>